Article
Multidisciplinary Sciences
Long Xiao, Shancheng Yan, Tianhong Chen, Junzhuan Wang, Yi Shi
Summary: Efforts have been made to improve the photoresponsivity of plasmonic photodetectors. In this study, photodetectors based on transparent conductive oxide (TCO)/Semiconductor/Metal configuration, specifically with a roughened interface, were numerically investigated. The results show that a roughened structure effectively alleviates the momentum mismatch of hot electrons at the metal/semiconductor interface, resulting in improved injection efficiency and photoresponsivity. At the incidence wavelength of 1550 nm, the photoresponsivity increased by about 8 times. The influence on the resonant wavelength shift is negligible at nano-scale roughness. This work provides valuable guidance for theoretical and experimental research on plasmonic photodetectors.
Article
Nanoscience & Nanotechnology
Wenhao Wang, Lucas Besteiro, Peng Yu, Feng Lin, Alexander O. Govorov, Hongxing Xu, Zhiming Wang
Summary: We propose a novel Ag grating/TiO2 cladding hybrid structure for hot electron photodetection (HEPD), which combines quasi-bound states in the continuum (BIC) and plasmonic hot electrons to achieve perfect absorption and multiband HEPD. By combining quasi-BIC and guided resonance, our structure enables more efficient light harvesting compared to traditional gold plasmonics.
Article
Multidisciplinary Sciences
Linan Zhou, Minhan Lou, Junwei Lucas Bao, Chao Zhang, Jun G. Liu, John Mark P. Martirez, Shu Tian, Lin Yuan, Dayne F. Swearer, Hossein Robatjazi, Emily A. Carter, Peter Nordlander, Naomi J. Halas
Summary: This study demonstrates that the H2-D2 exchange reaction catalyzed by Cu nanoparticles is primarily driven by thermalized hot carriers, with an intriguing intensity-dependent external quantum yield exceeding 100% at high light intensities. Quantum mechanical research suggests that vibrational excitations of the surface Cu-H bond are the likely activation mechanism, supporting the effectiveness of low-energy thermalized hot carriers in photocatalyzing this reaction.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Optics
Faramarz Alihosseini, Aref Rasoulzadeh Zali, Tavakol Pakizeh, Hesam Zandi
Summary: We propose a high-performance plasmonic photodetector based on the internal photoemission process for the C-band communication wavelength. By utilizing an embedded nanohole array and localized surface plasmon resonance, the absorption of the active metal layer is increased, generating more hot carriers and compensating for the low efficiency of IPE-based photodetectors.
Article
Nanoscience & Nanotechnology
Yifan Wang, Yu Zhu, Huaimin Gu, Xingfu Wang
Summary: In this study, an ultrafast response self-powered near-infrared photodetector was fabricated by coating Au nanoparticles on an n-ZnO nanowires/p-Si heterojunction. The local surface plasmon resonance effect generated by Au NPs significantly enhanced the transient temperature change rate of ZnO material, leading to improved photoresponse performances. This work provides insight into plasmonic effect-enhanced pyroelectric effect and offers a unique strategy for developing high-performance NIR photodetectors.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Zehao Song, Masiar Sistani, Fabian Schwingshandl, Alois Lugstein
Summary: This study presents a multifunctional Al-Si-Al heterostructure device with tunable Schottky barriers. It controls plasmon-induced hot carrier injection at a metal-semiconductor interface. The device achieves light absorption, surface plasmon generation, and separation of hot carriers through the decay of surface plasmons. The investigations aim to develop CMOS-compatible plasmonic photovoltaics with versatile implementations for autonomous nanosystems.
Article
Nanoscience & Nanotechnology
Anton Yu Bykov, Diane J. Roth, Giovanni Sartorello, Jorge U. Salmon-Gamboa, Anatoly Zayats
Summary: Through transient dynamic measurements, it has been shown that the relaxation of excited hot-carriers in Au/Pt hetero-nanostructures is accelerated through transfer from Au to Pt nanoparticles, leading to improved extraction efficiency of hot-carriers. These findings provide insight into time-dependent behavior of excited compound nanoscale systems and have important implications for engineering nonlinear optical response and hot-carrier-assisted photochemistry.
Article
Nanoscience & Nanotechnology
Yin-Jung Chang, Ko-Han Shih, Chun-Yu Hsiao
Summary: In this study, a novel hot-electron-based, non-trench-type photodetector exploiting pure photoexcitation in a thin aluminum film and leaky plasmonic modes at and between its heterojunctions is proposed, analyzed, and experimentally demonstrated. The device shows high external quantum efficiency and small active area. The optical absorption mechanism is unravelled through analysis and numerical computations, showing the significant contribution of leaky surface plasmon resonance and quasibound supermodes. The device achieves excellent performance at specific wavelengths and biases and could be applied in low-voltage, metal-based photodetection.
Article
Engineering, Electrical & Electronic
S. Chaoudhary, A. Dewasi, V Rastogi, R. N. Pereira, A. Sinopoli, B. Aissa, A. Mitra
Summary: This work compares the self-powered broadband photodetection properties of p-NiO/n-Si and p-NiO/Ag-NPs/n-Si heterojunction diodes. The results show that the Ag-NPs mediated heterostructure exhibits better photoresponse in the self-powered broadband range.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Nanoscience & Nanotechnology
Miguel Martinez-Calderon, Baptiste Groussin, Victoria Bjelland, Eric Chevallay, Valentin N. Fedosseev, Marcel Himmerlich, Pierre Lorenz, Alejandro Manjavacas, Bruce A. Marsh, Holger Neupert, Ralf E. Rossel, Walter Wuensch, Eduardo Granados
Summary: This research proposes the use of direct-laser nanostructuring techniques on copper substrates to improve the efficiency and robustness of electron photoinjectors. By exciting localized surface plasmons, hot electrons are generated, leading to a significant increase in quantum efficiency. When combined with semiconductor thin-films, the efficiency is further enhanced.
Article
Chemistry, Physical
Aditya Yadav, Avinash Kumar, Lalit Goswami, Rimjhim Yadav, Anuj Sharma, Govind Gupta
Summary: Visible photodetectors are widely used in various fields and semiconductors like WO3 and Au NPs have been employed to enhance the performance of visible light detection.
SURFACES AND INTERFACES
(2023)
Article
Optics
Gonzalo Santos, Marin Georghe, Cornel Cobianu, Mircea Modreanu, Maria Losurdo, Yael Gutierrez, Fernando Moreno
Summary: This paper presents a reconfigurable photodetector based on a metal-semiconductor configuration, utilizing hot-carrier and surface plasmons (SPs) hot-electron injection into semiconductors for narrowband photoresponse and sub-bandgap energy photodetection. By numerically studying the parameters of the dual-comb Au electrodes and the SP order, the absorption of the device is optimized, enabling tunable narrowband photodetection from the O telecom band to the C telecom band.
Article
Chemistry, Multidisciplinary
Cheng Zhang, Binglin Huang, Haoyu Li, Hui Chen, Tong Yu, Bingchang Zhang, Shaojun Wang, Changxu Liu, Yu Luo, Stefan A. Maier, Xiaofeng Li
Summary: Hot electron photodetection based on metallic nanostructures is attracting attention due to its potential to overcome the limitation of semiconductor bandgap. This study demonstrates ultrahigh optical absorption in ultrathin plasmonic nanoneedle arrays, achieved through a cost-effective fabrication technique. The efficient transport and injection of hot electrons enable the photodetector to achieve a record low noise level and exceptional imaging capabilities at the near-IR regime.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Pin-Tian Lyu, Xiao-Rui Liu, Li-Xin Yin, Pei Wu, Chao Sun, Hong-Yuan Chen, Jing-Juan Xu, Bin Kang
Summary: Understanding and managing hot electrons in metals play a vital role in plasmonic studies and applications. This study presents the ultrafast spatiotemporal evolution of hot electrons in plasmonic resonators, showing unique periodic distributions that can be adjusted by the resonator's size, shape, and dimension. Moreover, it reveals that the lifetimes of hot electrons are significantly prolonged at hot spots due to locally concentrated energy density. These findings are important for controlling the distributions and lifetimes of hot electrons, enabling targeted optoelectronic applications in plasmonic devices.
Article
Chemistry, Multidisciplinary
Andrea Schirato, Andrea Mazzanti, Remo Proietti Zaccaria, Peter Nordlander, Alessandro Alabastri, Giuseppe Della Valle
Summary: This paper investigates the hot-electron dynamics in nanostructured materials upon irradiation with Is-laser pulses and explores the opportunities for ultrafast diffraction management through the inhomogeneous evolution of hot carriers. The design of a highly symmetric plasmonic metagrating capable of transient symmetry breaking and the control of recovery time for symmetric configurations are discussed in detail.
